If you have hot on the left side and cold on the right, what happens when you turn it to the middle. Your question does not mention that.

: I have 2 bathrooms in the house - the bathtub has the meon taps - seems to be no setting for the right tempature - turn it to the left water is to hot - turn it to the right water is to cold - is there any way of setting this so the water tempature is in between as for now we can never take a shower - only baths and that you have to go back and forth just to have the water to the right tempature.